Usterka is a short woman with a fair skin complexion, with large eyes swollen with bags due to the exhausting work in the tunnels. Her hair is dark and cut into a short pixie style, with a fringe between the eyes. Usterka seems to be a silent, or selectively mute person. Although, it can be inferred that she is a rather optimistic person, always seen smiling even while not particularly happy and consistently providing the ghosts with affection and treats, despite them hunting her to kill her